Weatherproof for outdoor use.
Approx. dimension: 11.2(W)x20.1(L)x7(H)cm.
It can send out >110db (+3db or -3db) audio alarm and flash built-in LED/light when the system alarms.
It has built-in backup battery.
This item is wireless for the signal transmission and it needs it's power supply plugged into a socket.
Working Power: AC 100-240V 50/60Hz; DC 12V 1000mA
Built-in rechargeable backup battery